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Preparation method of arched anti-salinization biochar-geopolymer/metal net hybrid membrane

A technology of geopolymer and biochar, which is applied in chemical instruments and methods, carbon preparation/purification, water/sewage treatment and other directions, can solve the problems of complex preparation, high cost, low evaporation efficiency, etc., and achieves simple preparation and low cost. Inexpensive and the effect of improving the thermal insulation capacity

Active Publication Date: 2022-06-03
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these strategies require additional devices or chemical materials, and have disadvantages such as complicated preparation, high cost, and low evaporation efficiency.

Method used

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  • Preparation method of arched anti-salinization biochar-geopolymer/metal net hybrid membrane
  • Preparation method of arched anti-salinization biochar-geopolymer/metal net hybrid membrane
  • Preparation method of arched anti-salinization biochar-geopolymer/metal net hybrid membrane

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Effect test

Embodiment 1

[0029] A preparation method of arch-shaped anti-salt biochar-based-geopolymer / metal mesh hybrid membrane, the operation steps are as follows:

[0030] (1) Metal mesh pretreatment: Ammonium persulfate, sodium hydroxide and deionized water are mixed and prepared into a solution according to the mass ratio of 0.2:1:10, and several pieces of metal mesh copper mesh cut into 2cm×4cm and 200 meshes are put into the preparation Chemically etched in the resulting solution for 30min, then cleaned and dried;

[0031] (2) Preparation of geopolymer slurry: industrial sodium water glass is added with sodium hydroxide to change the modulus to 2.0 to obtain modified water glass for use; according to the mass ratio of metakaolin and slag being 1:1, weigh the metakaolin and Mix the slag evenly to obtain a mixed powder, and then add the above-mentioned modified water glass and deionized water with a modulus of 2.0 to the mixed powder (the mass ratio of deionized water and modified water glass is...

Embodiment 2

[0036] A preparation method of arch-shaped anti-salt biochar-based-geopolymer / metal mesh hybrid membrane, the operation steps are as follows:

[0037] (1) Metal mesh pretreatment: Ammonium persulfate, sodium hydroxide and deionized water are mixed and prepared into a solution according to the mass ratio of 0.5:1:10, cut into 2cm×4cm, 200 mesh pieces of metal mesh copper mesh, put into Chemical etching is carried out in the prepared solution for 30 minutes, and then cleaned and dried;

[0038] (2) Preparation of geopolymer slurry: industrial sodium water glass is added with sodium hydroxide to change the modulus to 1.2 to obtain modified water glass for use; according to the mass ratio of metakaolin and slag to be 0.5:1, weigh out the Mix the slag evenly to obtain a mixed powder, then add the above-mentioned modified water glass and deionized water with a modulus of 1.2 into the mixed powder (the mass ratio of deionized water and water glass is 0.5:1), and mechanically stir and m...

Embodiment 3

[0043] A preparation method of arch-shaped anti-salt biochar-based-geopolymer / metal mesh hybrid membrane, the operation steps are as follows:

[0044] (1) Metal mesh pretreatment: Ammonium persulfate, sodium hydroxide and deionized water are mixed and prepared into a solution according to the mass ratio of 0.4:1:10, cut into 2cm×4cm, 200 mesh pieces of metal mesh nickel mesh, put into Chemical etching is carried out in the prepared solution for 20min, and then cleaned and dried;

[0045] (2) Preparation of geopolymer slurry: industrial sodium water glass was added with sodium hydroxide to change the modulus to 1.0 to obtain modified water glass for use; according to the mass ratio of metakaolin and slag being 2:1, weigh the metakaolin and Mix the slag evenly to obtain a mixed powder, then add the above-mentioned modified water glass and deionized water with a modulus of 1.0 into the mixed powder (the mass ratio of deionized water and water glass is 1.5:1), and mechanically sti...

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Abstract

The invention discloses a preparation method of an arch-shaped anti-salinization biochar-geopolymer / metal net hybrid membrane. The preparation method comprises the following steps: (1) pretreating a metal net; (2) preparing geopolymer slurry; (3) compounding the geopolymer slurry prepared in the step (2) by a dipping method, and curing to obtain a geopolymer / metal net hybrid membrane; and (4) placing in a precursor solution for adsorption or coating, taking out, drying, and then calcining in a protective gas atmosphere, or carrying out hydrothermal reaction on the precursor solution to obtain the charcoal-based-geopolymer / metal net hybrid membrane. And (5) bending and folding to form the arched salt deposition prevention biochar-geopolymer / metal net hybrid membrane. According to the method, a metal net with good mechanical performance and toughness is used as a supporting body; the geopolymer is used as the transition layer, and the geopolymer can be used as a pore-filling material and has an anti-corrosion effect, and also can effectively improve the graphitization degree of the biochar, so that the photothermal conversion performance of the material is improved.

Description

technical field [0001] The invention relates to a preparation method of a hybrid membrane, in particular to a preparation method of an arch-shaped anti-salt biochar-based-geopolymer / metal mesh hybrid membrane. Background technique [0002] With population growth, increasing water pollution and continuous destruction of the water resources environment, a quarter of the population is currently facing a serious shortage of freshwater resources. According to the current water consumption trend, it is estimated that by 2030, freshwater supply Shortages will be close to 40%. To address the shortage of freshwater resources, people have turned their attention to the oceans, which occupy 71% of the earth's surface. Subsequently, seawater desalination technology has attracted the attention of various countries. Conventional seawater desalination technology mainly includes membrane separation technology, phase change thermal technology and hybrid process technology. Conventional seaw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/14C01B32/05C02F103/08
CPCC02F1/14C01B32/05C02F2103/08Y02A20/212Y02P40/10
Inventor 葛圆圆罗杉杉
Owner GUANGXI UNIV